Girls have sexual thoughts and desires...some girls are even as openly perverted as guys. Girls just tend to handle things a bit differently. A lot of them won't touch a guy until they trust him and like him where a guy would grab the first attractive female if he could then never see her again.

It's complicated and is different per individual. The easy answer is "yes"

Nope, I haven't met a girl who has a dirty mind at all. I believe they're really chaste and they wouldn't believe such thoughts! They're girls, for Pete's sake. They don't have the ability to even process thoughts of that kind. Only boys do that, because only they have raging hormones!